SOMEONE PLS HELP QUICwhat are TWO similarities between drag force and buoyant force

Drag Force in any viscous medium always opposes motion of moving particle. It depends upon the density of viscous medium and velocity of moving body in the medium. While Buoyancy force is the resultant of net pressure force in upward direction. BUOYANT FORCE depends upon density of medium and volume of body immersed into the medium.

Explanation:

Difference between drag and buoyancy force

Drag is due to frictional resistance caused by the motion of the object through the fluid, and acts against the direction of motion as indicated by the velocity vector "U". ... The buoyant force will counter the force of gravity, and accelerate the object upwards. But as velocity increases, so will the drag.

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

3. dark matter

empty space could also be a simple vacuum